Results 121 to 130 of about 206 (165)

The Gondwana connection of South China: Evidence from monazite and zircon geochronology in the Cathaysia Block

Gondwana Research, 2015
Abstract The tectonic evolution of the Cathaysia Block in South China has been debated, with limited information to constrain the early Paleozoic geodynamics and paleogeography in the context of the global Gondwana supercontinent. In this study, we report the petrology of mafic magmatic suites and metamorphic units, together with zircon and monazite ...
Chuan-Lin Zhang, M. Santosh, Qing-Bo Zhu, Xiang-Yan Chen, Wen-Cheng Huang   +4 more
openaire   +3 more sources

Mantle Upwelling Beneath the Cathaysia Block, South China

Tectonics, 2021
AbstractA large low‐velocity anomaly (LLVA) beneath the Cathaysia Block in South China that may be associated with mantle upwelling was revealed by seismic tomography. However, seismological and geological studies indicate that ascending mantle must have a higher temperature than the surrounding mantle, and a low‐velocity anomaly alone is not ...
Chuansong He, M. Santosh
openaire   +1 more source

Geophysical Evidence for the Ancient Suture Within the Cathaysia Block

2020
The Zhenghe-Dapu fault zone, which has a length of ~800 km and is located in southeastern China, has been mapped as a suture. Geological and geochronological data indicate that the suture is filled with chaotic pelagic sedimentary rocks and ophiolite melange that separated the Cathaysia block at ~860 Ma by rifting and later closed as one block at ~240 ...
Hui Teng Cai, Hao Kuo-Chen, Wen-Bin Doo, Chung-Pai Chang, Xin Jin, Yao-Wen Kuo, Chien-Ying Wang, Wen-Shan Chen, Wen-Yen Chang   +8 more
openaire   +1 more source

Basement heterogeneity in the Cathaysia crustal block, southeast China

Geological Society, London, Special Publications, 2004
Abstract Isotope signatures and T DM model ages in Hong Kong and neighbouring Guangdong Province have indicated that the basement of the Cathaysia Block is probably an amalgamation of narrow crustal slices, ranging in age from latest Archaean to Mesoproterozoic.
Fletcher, CJN, Chan, LS, Sewell, RJ, Campbell, SDG, Davis, DW, Zhu, J   +5 more
openaire   +3 more sources

Shear-wave splitting in the southeast of Cathaysia block, South China

Journal of Seismology, 2008
This study is focused on Fujing Province in China, southeast of Cathaysia block (SECB). The present work benefits from the data provided by the Fujian Seismic Network (FJSN) to study the seismic anisotropy in the crust. By means of a systematic analysis and adequate software package, we examine shear-wave splitting from data recorded at ten FJSN ...
Yuan Gao, Jing Wu, Jin-An Cai, Yu-Tao Shi, Shu Lin, Ting Bao, Zu-Ning Li   +6 more
openaire   +1 more source

Lithospheric electrical structure beneath the Cathaysia Block in South China and its tectonic implications

Tectonophysics, 2021
Abstract To better constrain the heat source of the geothermal system and lithospheric thinning mechanism of the Paleo-Pacific subduction zone, data from 35 broadband magnetotelluric (MT) stations were collected in 2020 along a 180-km-long NW-trending profile in the Cathaysia Block.
Yuanzhi Cheng, Bo Han, Yiman Li, Junfeng Guo, Xiangyun Hu   +4 more
openaire   +1 more source

Low‐Temperature Thermochronological Perspective on Geodynamic Evolution of the Cathaysia Block Since Early Mesozoic

Tectonics, 2023
AbstractMesozoic intrusive rocks are extensively outcropped in the Cathaysia Block (CB), indicating that they underwent significant exhumation after being formed. However, tectonothermal evolution of the CB during Mesozoic–Cenozoic times is still poorly constrained and associated geodynamic mechanisms driving the regional exhumation remain elusive ...
Jinghua Wu, Huan Li, Martin Danišík, Kotaro Yonezu, Han Zheng, Zhihan Li   +5 more
openaire   +2 more sources

Compositions and processes of lithospheric mantle beneath the west Cathaysia block, southeast China

Lithos, 2017
Abstract Knowledge about the nature and history of the lithospheric mantle beneath the west Cathaysia block (South China) is still sparse. The major- and trace-element compositions and H2O contents of minerals from peridotite xenoliths entrained in the Cenozoic lamprophyres of the Anyuan area (SE China), were conducted to investigate the nature and ...
Hui Zhang, Jianping Zheng, Shaokui Pan, Jianggu Lu, Yihe Li, Lu Xiang, Abing Lin   +6 more
openaire   +1 more source

Highly evolved Archean basement beneath the western Cathaysia Block, South China

Geochimica et Cosmochimica Acta, 2011
Abstract How has the Earth’s continental crust evolved? Most of our knowledge comes from surface exposures, but zircon xenocrysts in volcanic rocks can provide samples of deeper crustal levels. The U–Pb and Hf-isotope systematics of xenocrystic zircons brought to the surface by the Cenozoic (48–49 Ma) Pingnan basaltic rocks and the Mesozoic (166 Ma ...
J.P. Zheng, W.L. Griffin, L.S. Li, Suzanne Y. O’Reilly, N.J. Pearson, H.Y. Tang, G.L. Liu, J.H. Zhao, C.M. Yu, Y.P. Su   +9 more
openaire   +1 more source

Neoproterozoic bimodal magmatism in the Cathaysia Block of South China and its tectonic significance

Precambrian Research, 2005
SHRIMP U–Pb zircon age, geochemical and Sm–Nd isotopic results are reported for the Mamianshan volcanic rocks in the Cathaysia Block of southeastern South China. The Mamianshan volcanic rocks are bimodal in composition and are dominantly transitional to mildly alkaline basalts and subordinate alkaline rhyolite, with an eruption age of 818 ± 9 Ma.
Li, W., Li, X., Li, Zheng-Xiang
openaire   +2 more sources